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https://issues.apache.org/jira/browse/OPENJPA-2235?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Helen Xu updated OPENJPA-2235:
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Attachment: OPENJPA-2235.patch
good catch. Thanks
we should only check the isolation hint. Modified the code for that. Attached a
new patch.
> "READ_UNCOMMITTED" setting for the fetch plan isolation level is ignored in
> DB2Dictionary
> -----------------------------------------------------------------------------------------
>
> Key: OPENJPA-2235
> URL: https://issues.apache.org/jira/browse/OPENJPA-2235
> Project: OpenJPA
> Issue Type: Bug
> Components: performance, query
> Affects Versions: 2.1.1, 2.2.0, 2.3.0
> Reporter: Helen Xu
> Assignee: Helen Xu
> Attachments: OPENJPA-2235.patch, OPENJPA-2235.patch
>
>
> When user set query hint as shown below for db2, no "with UR" clause append
> to the query. The setting is ignored.
> query.setHint("openjpa.FetchPlan.Isolation", "READ_UNCOMMITTED");
> Uncommitted read is very risky and should be avoid if it is possible. JPA
> specification requires a minimum of read-committed isolation to ensure no
> "dirty read" and "non-repeatible read" can occur. Use of read-uncommitted
> isolation may cause data integrity problem.
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